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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 349 · 40 sums
TalentJR

The method (Column by column): Line up ones, tens and hundreds. Add from the right; 10 or more → carry 1 to the next column. Subtract from the right; top digit smaller → borrow 1 from the next column. Missing number in an addition = total − the number you know.

NameDateTime takenScore ___ / 40
  1. 1.460 + 367 =
  2. 2.A school has 524 children. 314 of them are girls. How many boys are there?
  3. 3.639 + ? = 798
  4. 4.719 + ? = 925
  5. 5.A train has 132 people in the front coaches and 592 people in the back coaches. How many people are on the train?
  6. 6.A train has 666 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  7. 7.? − 228 = 52
  8. 8.659 + 187 =
  9. 9.A train has 224 people in the front coaches and 708 people in the back coaches. How many people are on the train?
  10. 10.? − 454 = 351
  11. 11.A school has 794 children. 689 of them are girls. How many boys are there?
  12. 12.A train has 284 people in the front coaches and 239 people in the back coaches. How many people are on the train?
  13. 13.A school has 282 children. 275 of them are girls. How many boys are there?
  14. 14.716 − ? = 233
  15. 15.314 − ? = 91
  16. 16.157 + ? = 701
  17. 17.? + 241 = 600
  18. 18.658 − 583 =
  19. 19.? + 378 = 570
  20. 20.A train has 268 people in the front coaches and 316 people in the back coaches. How many people are on the train?
  21. 21.485 − 183 =
  22. 22.633 + 279 =
  23. 23.273 − ? = 30
  24. 24.905 − 419 =
  25. 25.100 + 583 =
  26. 26.912 − 800 =
  27. 27.231 + ? = 785
  28. 28.448 + 263 =
  29. 29.679 − 193 =
  30. 30.868 − 721 =
  31. 31.162 + 833 =
  32. 32.476 − ? = 203
  33. 33.A train has 556 people in the front coaches and 208 people in the back coaches. How many people are on the train?
  34. 34.812 + ? = 962
  35. 35.? + 420 = 717
  36. 36.? − 277 = 591
  37. 37.663 − ? = 509
  38. 38.884 + 100 =
  39. 39.700 − 243 =
  40. 40.740 − 265 =

Answer key

  1. 827
  2. 210
  3. 159
  4. 206
  5. 724
  6. 768
  7. 280
  8. 846
  9. 932
  10. 805
  11. 105
  12. 523
  13. 7
  14. 483
  15. 223
  16. 544
  17. 359
  18. 75
  19. 192
  20. 584
  21. 302
  22. 912
  23. 243
  24. 486
  25. 683
  26. 112
  27. 554
  28. 711
  29. 486
  30. 147
  31. 995
  32. 273
  33. 764
  34. 150
  35. 297
  36. 868
  37. 154
  38. 984
  39. 457
  40. 475

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